It's been a little over ten years since the Japanese auto giant Toyota
began selling its famed Prius in the United States. This year at the 2011 Detroit Auto Show, Toyota has unveiled a new Prius Concept and a new production offering. We had hints last year that Toyota was planning on expanding the Prius line, and the Prius C Concept is alone those lines. The carmaker has promised that this will be the most fuel-efficient hybrid in the United States by the first half of 2012.